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CN-224232583-U - Earthing switch for 17.5kV high-voltage alternating-current metal enclosed switchgear

CN224232583UCN 224232583 UCN224232583 UCN 224232583UCN-224232583-U

Abstract

The utility model discloses a grounding switch for 17.5kV high-voltage alternating-current metal closed switch equipment, which comprises a bottom frame, wherein a plurality of sensors are arranged at the top of the bottom frame, an assembly plate is fixed on the side surface of the bottom frame, the tops of the sensors are connected with fixed contacts, a closing device is arranged on the assembly plate and used for being contacted with or disconnected from the fixed contacts, an axle center hole is formed in one side, close to the bottom frame, of the assembly plate, an operation shaft is connected in the axle center hole and used for controlling the closing device to move, and an accelerating mechanism is arranged on the closing device and used for improving the closing speed of the closing device. The closing device comprises a grounding knife, a clamping device is arranged in the grounding knife, one end of a movable shaft is directly connected with a hinge end in a hinged mode, an additional connecting structural member is not needed, the movable shaft is directly connected with a corner plate, the force effect is improved, the transmission is improved, meanwhile, the additional connecting structural member is not needed, the manufacturing cost of a product can be reduced, and the whole structure is compact.

Inventors

  • HU QIUSHENG
  • WANG GANG
  • PAN JINLONG

Assignees

  • 浙江聚弘凯智能电气股份有限公司

Dates

Publication Date
20260512
Application Date
20250508

Claims (8)

  1. 1. The grounding switch for the 17.5kV high-voltage alternating-current metal closed switch equipment comprises a bottom frame (10), wherein a plurality of sensors (20) are installed at the top of the bottom frame (10), and the grounding switch is characterized in that an assembly plate (11) is fixed on the side surface of the bottom frame (10), and the top of each sensor (20) is connected with a fixed contact (201); The switching-on device is arranged on the assembly plate (11) and used for contacting or disconnecting with the fixed contact (201), an axle center hole (101) is formed in one side, close to the underframe (10), of the assembly plate (11), an operation shaft (30) is connected in the axle center hole (101), and the operation shaft (30) is used for controlling the movement of the switching-on device; an accelerating mechanism (50) is arranged on the closing device, and the accelerating mechanism (50) is used for improving the closing speed of the closing device; the closing device comprises a grounding knife (203), and a clamping device (60) is arranged in the grounding knife (203).
  2. 2. The grounding switch for 17.5kV high-voltage alternating-current metal-enclosed switchgear according to claim 1, wherein a rectangular contact end (202) is arranged below the fixed contact (201).
  3. 3. The grounding switch for 17.5kV high-voltage alternating-current metal-enclosed switchgear according to claim 2, wherein a triangular groove (301) is formed on one side of the operating shaft (30); The switching-on device further comprises a corner plate (40), an extension plate (403) is arranged at the top of the corner plate (40), the grounding cutters (203) are symmetrically arranged on two sides of the extension plate (403), a matching hole (401) is formed in a turning position of the corner plate (40), triangular protrusions matched with the triangular grooves (301) are arranged on the matching hole (401), and the operation shaft (30) is inserted into the matching hole (401) to be installed.
  4. 4. The grounding switch for 17.5kV high-voltage alternating-current metal-enclosed switchgear according to claim 3, wherein a mounting hole (2033) and a fixing hole (2034) are formed below the grounding knife (203), holes which are concentrically matched with the mounting hole (2033) and the fixing hole (2034) are formed in the extension plate (403), a bus shaft (204) is concentrically connected to the mounting hole (2033), and grounding wires (205) are arranged at two ends of the bus shaft (204).
  5. 5. The grounding switch for 17.5kV high-voltage alternating-current metal-enclosed switchgear according to claim 4, wherein a notch (2031) is formed in the center above the grounding knife (203), and a positioning hole (2032) is formed in the notch (2031).
  6. 6. The grounding switch for 17.5kV high-voltage alternating-current metal-enclosed switchgear according to claim 5, wherein the clamping device (60) comprises a concentric shaft (601), the concentric shaft (601) is inserted into the positioning hole (2032), compression nuts (603) are detachably connected to two ends of the concentric shaft (601), pressing pieces (604) are sleeved on the compression nuts (603), pressing springs (602) are sleeved on two ends of the concentric shaft (601), and two ends of the pressing springs (602) are contacted with one surfaces of the grounding knife (203) and the pressing pieces (604).
  7. 7. A grounding switch for a 17.5kV high-voltage alternating-current metal-enclosed switchgear as claimed in claim 3, wherein the corner plate (40) is provided with a hinge end (402) on the side close to the mating hole (401), and the acceleration mechanism (50) is connected with the hinge end (402).
  8. 8. The grounding switch for a 17.5kV high-voltage alternating-current metal-enclosed switchgear according to claim 6, wherein the accelerating mechanism (50) comprises a sleeve (501) and a movable shaft (502), one end of the sleeve (501) is hinged with the assembly plate (11), one end of the movable shaft (502) is hinged with the hinge end (402), the movable shaft (502) is slidably mounted in the sleeve (501), and the accelerating spring (503) is mounted on the sleeve (501).

Description

Earthing switch for 17.5kV high-voltage alternating-current metal enclosed switchgear Technical Field The utility model belongs to the technical field of grounding switches, and particularly relates to a grounding switch for 17.5kV high-voltage alternating-current metal closed switching equipment. Background The high-voltage AC metal-enclosed switchgear is a key device used in an electric power system, and is mainly used for distributing, controlling and protecting electric energy, and internal key elements of the high-voltage AC metal-enclosed switchgear comprise a circuit breaker, a disconnecting switch and a grounding switch. The grounding switch is mainly used for ensuring the safety of equipment and personnel, and is used for grounding a high-voltage circuit when the equipment is overhauled or maintained, and releasing residual charges to prevent electric shock accidents. When the system fails, the system is grounded quickly, so that the fault is prevented from expanding, and the safety of equipment and the system is protected. On one hand, the traditional grounding switch has slower closing speed of part of grounding switches on the aspect of operation performance, can not quickly establish reliable grounding connection, can not timely ensure the safety of personnel and equipment in emergency, has low energy utilization efficiency in the closing process, causes larger operation force, increases the labor intensity of operators, and also influences the whole service life of the equipment. On the other hand, in terms of structural design and reliability, the connection structure of some grounding switches is complex, and a plurality of additional connection structural members are needed to realize transmission and connection among all the components, so that the manufacturing cost of products is increased, the problems of loosening, abrasion and the like at the connection part are easily caused, the reliability and stability of the grounding switch are reduced, meanwhile, the contact pressure between a grounding knife and a contact end is difficult to adjust, the phenomena of poor contact, heating and the like are easily caused, the grounding effect is influenced, and even safety accidents are possibly caused. Disclosure of utility model The utility model aims to provide a grounding switch for 17.5kV high-voltage alternating-current metal-enclosed switchgear, which aims to solve the problems of complex data closing speed and connecting structure and grounding knife contact pressure adjustment in the prior art. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The grounding switch for the 17.5kV high-voltage alternating-current metal closed switch equipment comprises a bottom frame, a plurality of sensors are mounted on the top of the bottom frame, an assembly plate is fixed on the side face of the bottom frame, the tops of the sensors are connected with fixed contacts, a closing device is mounted on the assembly plate and used for being contacted with or disconnected from the fixed contacts, an axle center hole is formed in one face of the assembly plate, close to the bottom frame, of the assembly plate, an operation shaft is connected in the axle center hole and used for controlling the closing device to move, an accelerating mechanism is mounted on the closing device and used for improving the closing speed of the closing device. The closing device comprises a grounding knife, and a clamping device is arranged in the grounding knife. Preferably, a rectangular contact end is arranged below the fixed contact. Preferably, one side of the operation shaft is provided with a triangular groove, the closing device further comprises a corner plate, an extension plate is arranged at the top of the corner plate, the grounding cutters are symmetrically arranged on two sides of the extension plate, a turning part of the corner plate is provided with a matching hole, the matching hole is provided with a triangular protrusion matched with the triangular groove, and the operation shaft is inserted into the matching hole for installation. Preferably, the mounting hole and the fixing hole are formed below the grounding knife, the hole which is concentrically matched with the mounting hole and the fixing hole is formed in the extension plate, the mounting hole is concentrically connected with the bus shaft, and the grounding wires are arranged at two ends of the bus shaft. Preferably, a notch is formed in the center above the grounding knife, and a positioning hole is formed in the notch. Preferably, the clamping device comprises a concentric shaft, the concentric shaft is inserted into the positioning hole, two ends of the concentric shaft are detachably connected with compression nuts, the compression nuts are sleeved with pressing sheets, two ends of the concentric shaft are sleeved with compression springs, and two ends of each compression spring are contacted wi